Low volume fraction (< 1%)
Are used to reduce shrinkage cracking. These are used in slabs and pavements that have large exposed surface leading to high shrinkage crack.
Moderate volume fraction (between 1 and 2%) :
The presence of f at this volume fraction increase the modulus of rupture, fracture toughness, and impact resistance.
High volume fraction (greater than 2) :
The used at this level lead to strain hardening of the composites.
When are used in small amounts it is common to order in small pre-weighed packs and let the directly into the plant mixer or mixer truck without need for special feeding system. But when it comes to high capacity mass production with high precision and homogeneity this is where MEKA shows its best.MEKA Dosing equipment includes highly accurate steel/hard plastic and soft dosing systems with a range of dosing capacities shown in the table to suit the individual needs of our customers. MEKA Feeding Systems are with integrated conveyor and with a storage available on request as well as additional equipment custom-made for the requirements of our customers.weighing and feeding process can be integrated into the automation of the concrete plant to ensure full control over mixing quality and homogeneity. All dosing-feeding equipment is produced in accordance with CE and EMC directives.
Cylindrical body with spiral escalating pass ways is mounted on a robust steel framework. Two vibrators with adjustable amplitude provide tray movement for transfer of
Usage of -reinforced concreteThe main purpose of -reinforcement is to increase concrete’s structural integrity and improve flexural behavior. On the other hand, it is a more economical way comparing to regular steel reinforcement. There are many different types of that can be used in concrete reinforcement.
The machine dosing tray is commonly filled up with from big bags, but it can also be boxes or paper bags. Crane or forklift can be used for loading. By using indicators from the control panel on the materi feeder or directly from concrete plant computer the desired weight per batch can be set. We use negative weighing method. Weighed are fed by the feeding conveyor onto aggregates on the mixer feeding belt conveyor or into skip hoist. flow is adjusted according to aggregate flow to provide better distribution and to pre-mixand aggregates.
Feeding Capacity And ContentFeeding capacity varies depending on the type of used.
The vibrator engines are made for 380-400V/3ph/50Hz. Insulation class IP56. 60Hz version is available upon request.
Control System:Sensitive loadcells provide high accuracy weighing with less than 1% tolerance (depending on the type of ). The amount per batch can be adjusted by using indicators on the feeder or if fully integrated directly from the batch computer. With full integration several report types are available.
Installation And Start-up:Dosing Feeding unit comes pre-wired ready for operation and can be set up very quickly.
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